Click the above link to participate – for free!
Learn more about the above teachers – both regarded as legends in their own lifetime – on Wikipedia and here:
Vidya Shankar (1920-2010)
https://www.thehindu.com/features/friday-review/music/Art-and-science-converged-here/article16181169.ece
S. Rajam (1919-2010)
Remembering S. Rajam by S. Janaki (Executive Editor, Sruti magazine)
http://www.varalaaru.com/design/article.aspx?ArticleID=971
Related post
https://www.carnaticstudent.org/melakarta-raga-application/